Questions on Ingredients

Back to this question.... I will have to buy a sieve - I believe I was told
80 mesh.... Is that going to be fine enough?

"Bob Masta" wrote in message
...
On Fri, 16 Jul 2004 06:21:07 GMT, "dkat" wrote:

Well just posting has gotten me to the point of ordering ingredients.
Now
I'm stuck on which ones. Can anyone tell my why one over the other?
Is
the more expensive necessarily the better buy (or visa versa)?

whiting Snocal 40
whiting Vicron 2511

Wollastonite W10 200M
Wollastonite W20 352M

Rutile Light Ceramic
Rutile Dark Milled
Rutile Grandular

Neph Syn 270M Minex3
Neph Syn 400M Minex4

Potash Custer
Potash G-200

Bentonite Western 200M
Bentonite Western 325M
Bentonite B
Betonite 149

*Flint SIL-CO-SIL 75 (200M)
Flint SIL-CO-SIL 52 (325M)
Flint SIL-CO-SIL 40 (400M)


* is this what I'm to use for Silica in the MC6G book?


First, flint is indeed the form of silica most folks use.
Higher mesh numbers (xxxM) indicate finer powders;
they have been passed through a mesh with that
many threads or wires per inch. Finer powders make
glazes that will melt together faster, but I don't really
have any experience comparing differences betweeen
(say) 325M and 400M... I'd guess this would make no
difference to most uses. I tend to mentally divide things
into "coarse" and "fine" at around 100M, and wouldn't
hesitate to use anything over 200M in a glaze. Prices
may differ, so I'd go with what gets the job done most
economically.

And you might want to get some Gillespie Borate (or
some other GB substitute) for those times when you
need to get a low-temperature melt and low expansion.
There are lots of recipes that call for this (or an "equivalent"
frit), so I wouldn't rule it out just yet.

Just my $0.02 worth...



Bob Masta
dqatechATdaqartaDOTcom

D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com